Bump org.slf4j:slf4j-simple from 2.0.12 to 2.0.13 (#258)

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -12,7 +12,7 @@ okhttp = "4.12.0"
 okio = "3.9.0"
 # Ensure that PROTOC_VERSION in the Makefile is updated when changing this version.
 protobuf = "4.26.1"
-slf4j = "2.0.12"
+slf4j = "2.0.13"
 spotless = "6.25.0"
 
 [libraries]